This film is a perfect combination of the music of the great rock band Beatles and pop visual art into a two-dimensional illustration style animation, the whole film is interspersed with 15 classic Beatles songs. The film tells the story of Beatles member Paul McCartney coming to Zanthoxylum bungeanum, a place that hates music and is being invaded by blue demons. Old Captain Fred summoned Beatles members to ride yellow submarines to defend Zanthoxylum bungeanum. Beatles music runs through the film: the film begins with strings by George Martin (George Martin, Beatles music producer) to describe the peaceful country of Zanthoxylum bungeanum, and then the Yellow Submarine (Yellow Submarine) sung by Ringo Starr (Ringo Starr, Beatles drummer) symbolizes the vitality of the people of Zanthoxylum bungeanum. However, the good times did not last long, the bad blue heart demons began to destroy the happiness and tranquillity of Zanthoxylum bungeanum. The old captain recruited the Beatles "Come Together" to fight the blue heart demons, and the Beatles dressed up as Sgt. Pepper in the band "Petty Officer lonely heart club" (Sgt.
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